Question about 2008 Toyota Yaris Sedan

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The horn on my 2008 Yaris has stopped working

The horn was intermittant over a two week period, then it stopped working at all. is it the horn botton, relay, or horn?

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Someone would need to test the relay and the circuits it controls.
The horn pad grounds the relay to make the horn blow.

Posted on Apr 20, 2013

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Posted on Jan 02, 2017

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SOURCE: I have a 2008 Toyota

fuse!!!

Posted on Feb 14, 2011

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SOURCE: how to remove 2008 toyota yaris rear bumper

Go to this site. http://www.yarisworld.com/forums/showthread.php?t=33767

Further down you will see a diagram of the bumper removal.

remove the two bolts under the hatch, the four plugs along the bottom edge, and the plate light. Don't forget the red circle clip or bolt on the diagram. Then you just pull it off.

Posted on Dec 01, 2011

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SOURCE: 1987 toyota 4 x 4 horn stopped working. New horn

there should be a relay switch in the main fuse box under the hood 

Posted on Mar 07, 2010

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SOURCE: i depress my horn on my 2008 yaris and it stays on

Hello. Welcome to FixYa. Please allow us to help...

What you probably have is a bad "spiral cable", or better known as the "clockspring". This is a cable that winds and unwinds as the steering wheel is turned. This cable allows power to be transmitted to the air bag, to deploy it, in the event of a collision. Since the horn button is in front of the air-bag, the circuit that allows the horn to activate is also part of this cable device.

We would suggest having it properly checked by a professional who is very familiar with this device, and, if it is found to be bad, replaced. Non-professional diagnosis and poking about with the spiral cable could lead to an air bag that will not deploy.

Thanks for using FixYa for assistance today.

Posted on Mar 02, 2011

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This is a common problem with GM vehicles in that year range. The horn switch (buttons) in the steering wheel pad get stuck closed. The switches are embedded in the air bag assembly and would be difficult to replace. A temporary fix to stop the horn is to remove fuse #3 in the relay center which is located in the bottom of the dash on the passenger side, the plastic cover has to be removed for access. DO NOT only disconnect the wires from the horns as the relay switch that controls the circuit will remain powered constantly and will kill your battery. To restore horn function there are aftermarket horn button kits available at most auto parts stores.

If this info is helpful please give me a favorable rating.

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Hi,

As in most electrical problems, it would be required to do a bit of tracing/diagnosis to determine which is at fault. Most automotive horn system works on the same basic design. A switch in the steering wheel that energizes the horn relay that in turn powers the horn(s). A self activating horn could be caused by:
1: intermittent short in the steering wheel horn button;
2. intermittent shorting out horn relay;
3. intermittent short in the wiring.

Basing on the above possibilities, diagnostic/corrective action would involve:
a. tapping on the steering wheel (not the horn button) to see if jarring it would activate the horn, if yes then the problem is with the horn switch and often cleaning the inside/contact points of the switch should be corrective;
b. tapping the horn relay with the handle of a screwdriver to determine if jarring it would activate the horn, if yes then the problem is with the horn relay which of course would need replacement;
c. the wiring would be a bit more complicated if not time consuming. It would be necessary to wiggle the wires coming from the steering wheel/column to the main harness, to the fuse/relay bank finally to the horn to check at which point the trouble would resurface. Taping any exposed/bare/scraped wire would be corrective. It should be noted that the steering horn switch often would be "to ground" meaning the horn switch is switching the horn relay by providing the negative path, the relay is constantly supplied with B+12.

There are some instances that the horn could also activated by an alarm system.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jul 02, 2008 | 2004 Lincoln Town Car

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